SOLUTION: Four different colored flags can be hung in a row to make colored signal. how many signal can be maid if a signal consists of the display of one or more flags?

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Question 361863: Four different colored flags can be hung in a row to make colored signal. how many signal can be maid if a signal consists of the display of one or more flags?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
4+(4*3)+(4*3*2)+(4*3*2*1)
4+12+24+24=64 possible combinations.